Auto disable RSASHA1 and NSEC3RSASHA1 when not supported by the OS

The is a minimal change so that named can run on Oracle Linux 9 and RHEL9 with default crypto policy.

Primary zones using RSASHA1 and NSEC3RSASHA1 for signing need to be migrated off of those algorithms before upgrading/using Oracle Linux 9 and RHEL9.

Zones solely using RSASHA1 and NSEC3RSASHA1 will validate as insecure.

Edited Jul 21, 2022 by Mark Andrews

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information